Automatic air-feeding apparatus for furnaces.



N0. 660,456. Patented Oct. 23, I900.

F. PINTHER.

AUTOMATIC AIR FEEDINGAPPARATUS FOR FURNACES.

(Application filed Dec. 19, 1899.) (Np Model.) 2 Sheets-Sheet l.

- Irwe I 5 'mz mums varsns co nuc'rauruo WASHINGTON, 0. c4

No. 660,456. Patentd Oct. 23, I900;

. r. PINTHEB.

AUTOMATIC AIRFEEDING APPARATUS FOR FURNACES.

(Application filed Dec. 19, 1899.) (No Model.) 2 Sheet s-5haet 2.

Z; l I v 72/629 zzfir m: oams PEIERS co. PHOTO-UTNO WASHINGTON, n c

N TED STATES PATENT O FICE.

FELIX PINTHER, OF BERLIN, GERMANY.

AUTOMATIC AIR-FEEDING APPARATUS FOR FURNACES SPECIFICATION forming partof Letters Patent No. 660,456, dated. October 23, 1960.

Application filed December 19. 1899. Serial No. 740.917. on) model.)

To all whmn it may concern:

Be it known that I, FELIX PINTHER, engi-' neer, a subject of the King ofPrussia, Em-

peror of Germany, residing at No. 56 Baer waldstrasse, Berlin, in theKingdom of Prussia, German Empire, have invented a new and usefulImprovement in Automatic Air- Feeding Apparatus for Furnaces, of whichthe following is a specification.

It has been proved with grate-furnaces that if air is supplied in theright quantity and at the proper time and place, and if there is asufficient temperature in .the fire-box, and if provision is made for aproper mixture of the air with the gases produced, the combustion can berendered perfectly smokeless; but when making trials under thesecircumstances it was found that in practice the mix ture of air with theproducts of combustion and also the corresponding exact regulating ofthe air-supply could not be obtained permanently by the stoker.

The object of the present invention is to enable the mixing andregulating of the airsupply automatically in a useful manner and withoutany attendance.

In the accompanying drawings, Figure l is a sectional view showing theparts in one position, and Fig. 2 is a similar view showing the parts inreversed position.

The furnace-plate Ct, on which the grate b rests, is provided withseveral parallel slits c, which are closed below by a trap-door e,hinged on rod d. To this door 6 a lever g is fixed at a certain anglehinged to the rod f, to the other end of which the angle-lever hishinged. The latter is firmly connected to the shaft Z, which turns inbearings in front of the lirebox. On the same shaft 1, by the side ofthe fire-door m, the draw-lever n, provided with a handle, is arranged,at the outer end of which a chain or rope guided over a pulley to astopping device 13 is provided.

The function of the apparatus is as follows: Suppose the coals on thegrate b have burned so far. as to require a fresh supply. If for thispurpose the fire-doorm is opened, the lower side of the same at which asmall latch 0 may be provided touches the arm 2' of the angle-lever hand places the same in the direction of the arrow shown into theposition represented by Fig. 2, during which movement lever h acts onthe rod f and the latter on lever g, which then opens the trapdoor e,thus opening the slits c in the fireplate. It particles of coal shouldhave collected in the slits while the trap-door is closed, these canfall off from the slanting surface of the trap-door when the same isopened. The slits themselves are widened below ,which prevents littlepieces of coal getting wedged in them.

There can be no doubt that by dividing the air-current by means of theslit-openings 0 into several currents of air of comparatively greatspeed of admission an excellent distri bution of the air over the fueland in the gases developing out of the same is efiected, thus fulfilling the condition of a good mixture.

As aforementioned, the draw-lever n moves on the shaft Z before thefire-box, with which it is firmly connected, and also being connected insuitable manner with a stopping device. The latter is so arranged thatwhen the trap-door e is completely opened, in which case the draw-levern stands in the position indicated by Fig. 2, it is drawn up again bymeans of a spring or Weight, according to the course of combustion, andthe trap-door e is thus closed. By regulating the stopping device insuitable manner the trap-door e can be closed, as may be required.Shortly after putting fresh fuel on the fire the greater part of the airis therefore introduced with greater speed absolutely automatically infinely-dispersed currents, While, according to the degasification of thefuel on the grate, less air and with less speed is introduced alsoautomatically. When the degasification is complete, the trap-door ecloses entirely and the air is stopped.

What I claim is In a furnace the combination with the furfor closingsaid openings and a furnace-door, of a rock-shaft having connectionsleading to the door 6 for controlling the same, a projection from theshaft extendingin the path of the furnace-door and adapted to beoperated thereby, an arm extending from the rockshaft and means forautomaticlly moving said arm whereby said door e is closed through thesaid connections, substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

FELIX PIN THER. Witnesses:

WOLDEMAR HAUPT, HENRY HAsPER.

nace-plate having openings therein, a door 6

